Quarterly report pursuant to Section 13 or 15(d)

CONSOLIDATED SCHEDULE OF PORTFOLIO INVESTMENTS (Unaudited) (Parenthetical)

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CONSOLIDATED SCHEDULE OF PORTFOLIO INVESTMENTS (Unaudited) (Parenthetical) - USD ($)
 3 Months Ended 12 Months Ended
Mar. 31, 2024
Dec. 31, 2023
Schedule of Investments [Line Items]    
Percentage of fair value level 3 investments 95.00% 91.00%
Investment at Cost $ 76,904,315 $ 68,365,606
Interest due from investments $ 347,755 $ 244,600
Minimum percentage of total assets in qualifying assets 70.00% 70.00%
Percentage of aggregate assets in non-qualifying assets 6.27% 5.38%
Blocker corporation    
Schedule of Investments [Line Items]    
Equity owned percentage 100.00% 100.00%
Fair Value    
Schedule of Investments [Line Items]    
Investment at Cost $ 76,900,000 $ 68,400,000
Net unrealized appreciation 5,900,000 8,800,000
Unrealized appreciation of investment securities 11,300,000 14,100,000
Unrealized depreciation of investment securities 5,500,000 5,400,000
Aggregate gross unrealized gain for federal income tax 11,600,000 14,100,000
Aggregate gross unrealized loss for federal income tax 4,200,000 4,200,000
Net unrealized gain for federal income tax 7,400,000 9,900,000
Tax cost 75,400,000 68,000,000
Minimum    
Schedule of Investments [Line Items]    
Interest due from investments $ 50,000 $ 50,000
Percentage of voting securities 5.00% 5.00%
Percentage of board representation 50.00% 50.00%
Maximum    
Schedule of Investments [Line Items]    
Percentage of voting securities 25.00% 25.00%